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Clinical Orthopaedics and Related Research®

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01-11-2010 | Clinical Research

Osteolysis in Well-functioning Fixed- and Mobile-bearing TKAs in Younger Patients

Authors: Young-Hoo Kim, MD, Yoowang Choi, MD, Jun-Shik Kim, MD

Published in: Clinical Orthopaedics and Related Research® | Issue 11/2010

Abstract

Background

Periprosthetic osteolysis is an increasingly prevalent complication of TKA. To reduce the polyethylene wear and periprosthetic osteolysis, particularly in young patients, the design of the contemporary fixed-bearing TKAs has been modified and mobile-bearing TKAs have been introduced.

Questions/purposes

We asked whether the prevalence of osteolysis would be less in well-functioning mobile-bearing TKAs than in well-functioning contemporary fixed-bearing TKAs in young patients.

Patients and Methods

We compared 488 patients (894 knees) who received fixed-bearing knee prostheses with 445 patients (816 knees) who received mobile-bearing knee prostheses. There were 187 men and 301 women (mean age, 58.6 years; range, 33-65 years) in the fixed-bearing group and 167 men and 278 women (mean age, 55.7 years; range, 33-65 years) in the mobile-bearing group. The mean followup was 12.6 years (range, 10–17 years) in the fixed-bearing group and 12.9 years (range, 10–17 years) in the mobile-bearing group.

Results

The incidence of osteolysis was 1.6% (14 of 894 knees) in the fixed-bearing group and 2.2% (18 of 816 knees) in the mobile-bearing group at the final review. The mean postoperative Knee Society knee and function scores were 92.9 points and 83.5 points, respectively, in the fixed-bearing group and 90.7 points and 83.8 points, respectively, in the mobile-bearing group. The revision rates were 3.7% (33 of 894 knees) in the fixed-bearing group and 2.7% (22 of 816 knees) in the mobile-bearing group.

Conclusions

We found the incidence of osteolysis, rate of revision, and implant survivorship were similar between fixed-bearing and mobile-bearing TKAs in younger patients.

Level of Evidence

Level III, therapeutic study. See the guidelines for authors for a complete description of levels of evidence.

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Title: Osteolysis in Well-functioning Fixed- and Mobile-bearing TKAs in Younger Patients
Authors: Young-Hoo Kim, MD
Yoowang Choi, MD
Jun-Shik Kim, MD
Publication date: 01-11-2010
Publisher: Springer-Verlag
Published in: Clinical Orthopaedics and Related Research® / Issue 11/2010
Print ISSN: 0009-921X
Electronic ISSN: 1528-1132
DOI: https://doi.org/10.1007/s11999-010-1336-2

2024 ASCO Annual Meeting

Springer Medicine

Osteolysis in Well-functioning Fixed- and Mobile-bearing TKAs in Younger Patients

Abstract

Background

Questions/purposes

Patients and Methods

Results

Conclusions

Level of Evidence

2024 ASCO Annual Meeting

Springer Medicine

Abstract

Background

Questions/purposes

Patients and Methods

Results

Conclusions

Level of Evidence

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